131221342312301 has 4 divisors (see below), whose sum is σ = 131597334697500. Its totient is φ = 130845349927104.

The previous prime is 131221342312271. The next prime is 131221342312321. The reversal of 131221342312301 is 103213243122131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82874713638025 + 48346628674276 = 9103555^2 + 6953174^2 .

It is a cyclic number.

It is not a de Polignac number, because 131221342312301 - 2⁶ = 131221342312237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221342312321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187996192076 + ... + 187996192773.

It is an arithmetic number, because the mean of its divisors is an integer number (32899333674375).

Almost surely, 2^{131221342312301} is an apocalyptic number.

It is an amenable number.

131221342312301 is a deficient number, since it is larger than the sum of its proper divisors (375992385199).

131221342312301 is an equidigital number, since it uses as much as digits as its factorization.

131221342312301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375992385198.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 131221342312301 its reverse (103213243122131), we get a palindrome (234434585434432).

The spelling of 131221342312301 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred forty-two million, three hundred twelve thousand, three hundred one".